We have created multiple workflow rules with similar criteria that are going to trigger simultaneously for the same object; we also have multiple actions triggering and we would like to know if there's going to be any particular order of execution on both workflow rules and workflow actions once they kick off.

Resolution

Please note that Salesforce does not support or guarantee the order of execution of workflow rules.The same is true for workflow actions, the order in which individual actions and types of actions are executed is not guaranteed. However, field update actions are executed first, followed by other actions.

Please do not rely on any logic based on order of execution that you may obtain from debug logs, for example, as we do not guarantee that the execution of individual workflows would be the same the next time the workflow and actions are triggered.